I seem to be having trouble too,so it's not a localised problem.
I need to re-start my xbox sometimes for it to take effect-then seems ok.
I do on occasion get "connection interupted" pop up on me,especially on cod4.....anyone else get this?
God **** lag switchers!!!

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"Police up your spare rounds and frags.Don't leave nothin' for the dinks." Sgt Elias Grodin-Platoon